modra40 MongoDB Mastery (Senior → Principal)
Operate
- Start from access patterns, not abstract document purity.
- Choose embedding vs referencing based on write/read shape and document growth.
- Treat indexes, replication, and shard keys as architecture, not tuning afterthoughts.
- Model operational failure modes early: elections, lag, chunk imbalance, hot partitions.
Default Standards
- Schema flexibility is not permission for schema chaos.
- Indexes must serve real query patterns.
- Keep document growth and update amplification visible.
- Design shard keys to avoid hot shards.
- Monitor replication lag and query planner regressions.
References
- Schema and indexing: references/schema-and-indexing.md
- Operations and reliability: references/operations-and-reliability.md
- Document modeling: references/document-modeling.md
- Query patterns: references/query-patterns.md
- Aggregation and analytics: references/aggregation-and-analytics.md
- Transactions and consistency: references/transactions-and-consistency.md
- Replication and elections: references/replication-and-elections.md
- Sharding and shard keys: references/sharding-and-shard-keys.md
- Capacity planning: references/capacity-planning.md
- Backup, restore, and DR: references/backup-restore-and-dr.md
- Observability: references/observability.md
- Security and tenancy: references/security-and-tenancy.md
- Schema evolution: references/schema-evolution.md
- Multi-tenant MongoDB: references/multi-tenant-mongodb.md
- Incident runbooks: references/incident-runbooks.md